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Femtosecond inscription and thermal testing of Bragg gratings in high concentration (40 mol%) Germania-doped optical fibre

Femtosecond inscription and thermal testing of Bragg gratings in high concentration (40 mol%) Germania-doped optical fibre
Femtosecond inscription and thermal testing of Bragg gratings in high concentration (40 mol%) Germania-doped optical fibre
“Using point-by-point infrared femtosecond laser inscription, a fibre Bragg grating with a resonance wavelength of 1550.28±0.02 nm, 25 dB extinction ratio and 1.10±0.02 nm bandwidth (measured at first minima) was inscribed in a high concentration (40 mol%) germania-doped silica fibre.” At this wavelength, the high concentration germania doped silica fibre had a normalized frequency V ≃ 3.06 permitting higher order mode propagation. Subsequently, two additional Bragg resonances were recorded at 1534.40±0.02 and 1535.78±0.02 nm corresponding to the coupling of the forward propagating fundamental mode and counter propagating HE21 and TM01/TE01 respectively. Thermal tests revealed the grating was stable up to 800 °C for 30 minutes. Analysis determined the grating had first and second order coefficients dλB/dT = 11.1 pm/°C and d2λB/dT2 = 8.37×10-3 pm2/°C2 respectively.
1094-4087
32879-32886
Donko, Andrei, Laszlo
3786c6f9-efb1-4d38-8366-9df4e9bd4033
Núñez-Velázquez, Martin
3c102956-ac51-4d02-9fe6-6628557cfbff
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Guzman Cruz, Fernando, Alberto
19e24c46-ae30-465b-9d53-853ebf207b2e
Ismaeel, Rand
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Lee, Timothy
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Sahu, Jayanta
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Beresna, Martynas
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Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Donko, Andrei, Laszlo
3786c6f9-efb1-4d38-8366-9df4e9bd4033
Núñez-Velázquez, Martin
3c102956-ac51-4d02-9fe6-6628557cfbff
Barua, Pranabesh
ab53bdd9-e00f-46b0-b4f4-5ab6534fe8a6
Guzman Cruz, Fernando, Alberto
19e24c46-ae30-465b-9d53-853ebf207b2e
Ismaeel, Rand
c1fb0984-a4c0-484a-8aef-625d48a62086
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Beresna, Martynas
a6dc062e-93c6-46a5-aeb3-8de332cdec7b
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Donko, Andrei, Laszlo, Núñez-Velázquez, Martin, Barua, Pranabesh, Guzman Cruz, Fernando, Alberto, Ismaeel, Rand, Lee, Timothy, Sahu, Jayanta, Beresna, Martynas and Brambilla, Gilberto (2017) Femtosecond inscription and thermal testing of Bragg gratings in high concentration (40 mol%) Germania-doped optical fibre. Optics Express, 25 (26), 32879-32886. (doi:10.1364/OE.25.032879).

Record type: Article

Abstract

“Using point-by-point infrared femtosecond laser inscription, a fibre Bragg grating with a resonance wavelength of 1550.28±0.02 nm, 25 dB extinction ratio and 1.10±0.02 nm bandwidth (measured at first minima) was inscribed in a high concentration (40 mol%) germania-doped silica fibre.” At this wavelength, the high concentration germania doped silica fibre had a normalized frequency V ≃ 3.06 permitting higher order mode propagation. Subsequently, two additional Bragg resonances were recorded at 1534.40±0.02 and 1535.78±0.02 nm corresponding to the coupling of the forward propagating fundamental mode and counter propagating HE21 and TM01/TE01 respectively. Thermal tests revealed the grating was stable up to 800 °C for 30 minutes. Analysis determined the grating had first and second order coefficients dλB/dT = 11.1 pm/°C and d2λB/dT2 = 8.37×10-3 pm2/°C2 respectively.

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Femtosecond Inscription And Thermal Testing Of Bragg Gratings In High Concentration (40 mol%) Germania-Doped Optical Fibre
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Accepted/In Press date: 5 November 2017
e-pub ahead of print date: 18 December 2017

Identifiers

Local EPrints ID: 415519
URI: http://eprints.soton.ac.uk/id/eprint/415519
ISSN: 1094-4087
PURE UUID: a627ab69-e8c6-43ca-9eb9-d899cf2ceaf2
ORCID for Andrei, Laszlo Donko: ORCID iD orcid.org/0000-0003-1884-743X
ORCID for Martin Núñez-Velázquez: ORCID iD orcid.org/0000-0003-0774-3272

Catalogue record

Date deposited: 14 Nov 2017 17:30
Last modified: 03 Dec 2019 01:28

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Contributors

Author: Pranabesh Barua
Author: Rand Ismaeel
Author: Timothy Lee
Author: Jayanta Sahu

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